JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Topic Test - Electrochemistry

  • question_answer
    The same quantity of electricity was passed through two electrolytic cells containing a salt of metal X and zinc sulphate solution respectively using platinum electrode. 0.468 g of metal X and 1.532 g of Zn were deposited. The equivalent mass of X is (At. wt. of Zn is 65.4 u)

    A) 9.98 g/equiv

    B) 3.2 g/equiv

    C) 5.9 g/equiv

    D) 0.99 g/equiv

    Correct Answer: A

    Solution :

    [a] Gram equivalent of metal \[=geq.\] of Zn
    \[\frac{0.468}{{{E}_{M}}}=\frac{1.532}{{{E}_{Zn}}}\]
    \[\Rightarrow \]   \[\frac{0.468}{{{E}_{M}}}=\frac{1.532\times 2}{65.4}\]\[\left[ \because {{E}_{Zn}}=\frac{65.4}{2} \right]\]      \[{{E}_{M}}=9.98\,g/eq\]


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